<form action="test4.php" method="post" enctype="multipart/form-data">
        <input type="hidden" name="MAX_FILE_SIZE" value="">
        <input type="file" name="pic1" ><br>            
        <input type="file" name="pic2"><br>
        <input type="file" name="pic3"><br>
        <input type="submit" value="upload">
    </form> 